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During a circus performance, a 71.2-kg human cannonball is shot out of a 16.8-m-long cannon. If the human cannonball spends 1.06 s in the cannon, determine the average net force exerted on him in th
A rock is thrown vertically upward from ground level at time t = 0. At t = 1.8 s it passes the top of a tall tower, and 2.0 s later it reaches its maximum height. What is the height of the tower?
The electric field intensity between two large, charged, parallel metal plates is 8400 N/C. The plates are 0.06 m apart. What is the electric potential difference between them?
The charge per unit area on each plate has a magnitude of s = 1.10 x 10-4 C/m2. The force on q1 due to q2 equals the force on q1 due to the electric field of the parallel plate capacitor. What is th
A line of positive charge is formed into a semi circle of radius R = 60.0 cm. The charge per unit length along the semicircle is described by the expression λ=λ0 cos θ. The total
A 70.0-kg person stands on a scale in an elevator. What is the apparent weight in each of the following situations? (a) when the elevator is accelerating upward with an acceleration of 1.80 m/s2
Determine the average value of the translational kinetic energy of the molecules of an ideal gas at (a) 12.0°C and (b) 104°C. What is the translational kinetic energy per mole of an ideal ga
A spherical surface completely surrounds a collection of charges. Find the electric flux through the surface if the collection consists of each of the following.
An automobile tire has a volume of 1.64 x 10-2 m3 and contains air at a gauge pressure (pressure above atmospheric pressure) of 162 kPa when the temperature is 0.00°C. What is the gauge pressure
A rope, under a tension of 280 N and fixed at both ends, oscillates in a second-harmonic standing wave pattern. The displacement of the rope is given below where x = 0 at one end of the rope, x is i
An elevator cab and its load has a combined mass of 1600 kg. Find the tension in the supporting cable when the cab, originally moving downward at 12 m/s, is brought to rest with constant acceleratio
A car is traveling at 30.0 m/s when the driver suddenly applies the brakes, giving the car a constant deceleration. The car comes to a stop in a distance of 120.0 m. What was the deceleration of the
Particles of charge +150, - 76, and +32 mC are on one line. The negative one is in the center, 55 mm from each of the other two. Calculate magnitude and the direction of the net force acting on each
An with a mass of 80 kg sits on a chair of mass 10 kg. A) Find the weights of the man and the chair.
A grandfather clock is controlled by a swinging brass pendulum that is 1.1 m long at a temperature of 25°C. (a) What is the change in the length of the pendulum rod when the temperature drops to 0
A block with a weight of 3.2 N is at rest on a horizontal surface. A 1.1 N upward force is applied to the block by means of attached vertical string. (a) What is the magnitude of the force of the bl
A 3.1 µC is at x = 0 and a -2.0 µC charge is at x = 4.2 cm. Let V = 0 at r = infinity. (a) At what point along the line joining them is the electric field zero? (b) At what points is the p
In 1971, Apollo 15 astronaut David Scott dropped a hammer and feather on the moon. The feather fell a distance of 0.73 m in the first second. A) Did the hammer fall a larger or shorter distance in t
Then security agents appear and the man runs as fast as he can back along the sidewalk to his starting point, taking 9.00 s. What is the ratio of the man's running speed to the sidewalk's speed? (ru
What is the magnitude of the centripetal acceleration of the stone while in circular motion? the stone while in circular motion?
A charge of 3.47 micro columbs is held fixed at the origin, A second charge of 3.47 micro columbs is released from rest at the position (1.15m, .410 m). If the mass of the second charge is 1.50 g, w
A 25 µF capacitor charged to 4.2 kV and a second 50 µF capacitor charged to 6.3 kV are connected to each other, with the positive plate of each connected to the negative plate of the o
A 2.0kg, 20cm diameter turntable rotates at 100rpm on frictionless bearings. Two 500g blocks fall from above, hit the turntable simultaneously at opposite ends of a diagonal, and stick. What is the
The driver of a 3000 lb car, coasting down a hill, must stop at the bottom. His speed when he applies the brakes is 60 mph & he is 100 feet (vertically) from the bottom of the hill. How much en
After flying for 15 min in a wind blowing 42 km/h at an angle of 22° south of east, an airplane pilot is over a town that is 42 km due north of the starting point. What is the speed of the airpl